Spark arrester



May 12, `1942. WILL SPARK ARRESTER Filed Jan. 19, 1940 gin/vmbo@ Hugo 'will Patented May 12, 1942 y IUN i r E D STAT E s PATEN Ti o Price 2,282,595 Y SPARK ARRESTER VHugo Will, Elk Rapids, Mich.

Application January 19l 1940, SerialINo. 314,639l (c1. 18s-64) v 2 Claims.

The present invention relates to spark arresters and more particularly to a spark arrester adapted for attachment to the head of a smoke stack.

The primary objects of the instant invention are to provide a spark arrester of the character above indicated having a cylindrical wire mesh screen adapted to be continuously rotated by wind currents whereby the wire mesh is constantly cleansed of soot emanating from the stack; to provide such a spark arrester having a plurality of substantially equally spaced vertically disposed vanes secured thereto whereby even the slightest breeze will effect a rotation of the spark arrester; to provide such a spark arrester which may be readily and conveniently installed and CII hangingY the jupstanding flange I4 of the head -v plate I2, has a pair of spaced struts 2|, 22, transversely disposed with reference to each other, each strut being secured at its opposite ends between the opposite sides of the screen 20 as by bolts 23 which are projected through downwardly secured to a stack; to provide such a spark i arrester which is highly eicient in use; and, to provide such a spark arrester which is economical in manufacture. Y

An illustrative embodiment of the invention is shown in the accompanying drawing, wherein: Figure 1 is a sectional View of a smoke stack and the spark arrester mounted on its head, all on line I-I of Figure 2; and Y Figure 2 is a top plan view thereof. Referring then to the drawing wherein like parts of the stack and its spark arrester are designated by the same numerals in the several views, the stack I0, here shown as constructed from a plurality of bricks and square in form, has a lining member I I disposed within its walls, it being understood of course that the stack may be longitudinally cylindrically formed of sheet metal plates or of any other suitable material.

A head plate I2, preferably of sheet metal and here shown as in square form substantially equal in length and width to that of the outer dimensions of the upper end of the stack and secured thereto in any suitable manner as by bolts I3, is here shown as provided with a circular opening circumscribed by an upstanding flange I4 disposed somewhat inwardly of the diameter of the lining member II of the stack, all as shown in Figure I. Y

A hat bar I5, preferably of metal, is disposed lbelow and between the opposite sides of the squared head plate I2 adjacent the under surface thereof to which it is secured Yas by bolts I6 and a post I'I in the form of a rod disposed medially of the bar I5'and extending upwardly therefrom is securedthereto as by the bolt I8 projected upwardly through the -bar I5, washer I9 and in tapped threaded engagement with its lower end.

A cylindrical screen of wire mesh, open at its bottom but closed at its top and spacedly overbest flanged outer end portions 24 of each strut and through the screen 2U, all as best shown in Figure 1.

The post Il proiects upwardly through bearing apertures disposed medially of the length of each strut 2I,. 22 and the upper end of the post engages the under sideof the bridge 25 whose opposite ends are secured to the upper surface of the upper strut 2l as by bolts 26. A washer 21 circumscribing the .p ost I1 and lying on the upper surface of the upper strut 2| is maintained in place by the cotter key 28.

' A plurality of elongated vanes 29, arcuately formed in cross section, are equi-distantly secured to the outer surface of the screen 20 longitudinally thereof and in a manner so that each of their concave surfaces will catch wind currents. A continuous` rotation of the spark arrester thus rotatably mounted on the post I'I is thereby effected to cleanse the screen during even the slightest breeze. This wire mesh screen 25 is thus constantly cleansed of soot emanating from the stack I0 which would otherwise clogV the screen and interfere with'the stack draft.

It will thus be seen that the spark arrester may be readily and conveniently installed and securedl to the stack, is highly efficient in use and is economical in manufacture and while but one,`

specific embodiment of the invention has been herein shown and described, it will be understood that certain details of the construction shown may be altered or omitted without departing from the spirit of the invention as the same is defined by the following claims.

Iclaim:

1. A spark arrester comprising ahead plate adapted to be secured to the head of .a smoke stack and having a circular stack draft emitting opening therethrough circumscribed byV an upstanding flange, a verticallyA disposed post supported by the head plate andv extending upwardly therefrom medially of its opening, a cylindrical vwire mesh screen spacedly overhanging said upstanding flange providing a draftopening between the flange and screen and rotatably supported on said post, anda plurality of equidistantly spaced vanes secured to theV outer surface of said screen for effecting continuous rotation t of the screen uponits supporting post whereby 2 l memes the screen is cleansed by the wind during the rotation of the screen.

2. A spark arrester comprising a head plate adapted to be secured to the head of a smoke stack and having a circular stack draft emitting opening therethrough circumscrbed by an upstanding ange, a bar traversing said opening and secured at its opposite ends to said head plate, a vertically disposed post supported on Y said bar and extending upwardly therefrom medially of said opening, a cylindrical wire mesh 10 HUGO WILL. 

